Fiber products with a coating formed from aqueous polymer dispersions
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current coating systems for textile-reinforced concrete fail to provide adequate tensile strength and temperature resistance, limiting their application to indoor use and requiring high anchoring lengths, while also being impractical for continuous processing and drapable textiles.
Innovation Solution
Aqueous polymer dispersion based on ethylenically polymerizable monomers with a glass transition temperature of at least 60°C, applied in a continuous water-based process, which coats fibrous products like carbon and glass fibers, enhancing their tensile strength and resistance to alkaline environments, allowing for windable and drapable reinforcing textiles suitable for outdoor applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional coating systems are used for textile-reinforced concrete, then the coating can be applied, but the tensile strength and temperature resistance are inadequate, limiting application to indoor use
Solution Approach 1:
The patent changes the chemical composition parameters of the coating system by using aqueous polymer dispersions based on polyacrylonitrile, polyacrylic acid, polyacrylamide, or their copolymers. These specific polymers provide both high tensile strength (>3000 MPa) and temperature resistance from -30°C to +100°C, resolving the contradiction between strength and reliability under varying temperatures.
2Reliability
If conventional coating systems are used, then the coating provides some protection, but high anchoring lengths are required
Solution Approach 1:
The patent modifies the coating parameters by implementing a water-based polymer dispersion system with specific polymer types and concentrations. This achieves superior bonding strength between the textile reinforcement and concrete matrix, allowing for reduced anchoring lengths while maintaining reliable structural performance.
3Ease of manufacture
If conventional coating processes are used, then the coating can be applied, but continuous processing and drapable textiles are impractical
Solution Approach 1:
The patent employs a water-based coating process that utilizes the fluid properties of aqueous polymer dispersions. This hydraulic approach enables continuous coating application and maintains textile drapability, as the water-based formulation allows for easy application and processing without compromising the flexibility and formability of the textile reinforcement.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The coated textiles exhibit tensile strengths of over 3000 MPa across a -30°C to 100°C temperature range, maintaining composite properties and resisting alkaline environments, enabling their use in outdoor concrete applications with reduced material thickness and improved sustainability.
Implementation Method 1
contacting a fibrous product with said aqueous polymer dispersion, followed by drying
Implementation Method 2
resisting alkaline environments
Data Source
AI summary
The present invention relates to textile fibre products having a coating comprising polymers based on ethylenically polymerisable monomers with a glass transition temperature of at least 60° and a coating method for coating fibre products with an aqueous polymer dispersion, wherein an aqueous polymer dispersion based on vinyl polymerisable monomers with a glass transition temperature of at least 60° C. is firstly provided, and this is brought into contact with a fibre product and then dried. The invention also relates to the use of corresponding polymer dispersions for the coating of fibre products, correspondingly coated fiber products, use thereof to reinforce mineral matrices, and corresponding fibre-composite materials, in particular textile-concrete composite materials. In particular, the invention relates to a coating means that can be applied to a textile fabric in a continuous, water-based process and enables an optimal introduction of force from the mineral matrix into the textile reinforcement.